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Fiber Concrete
Fiber-reinforced concrete is defined as a kind of concrete mix that comprises fibrous materials which could either be synthetic fibers, glass fibers, or natural fibers. Fiber-reinforced concrete is made up of cement, mortar, and discrete. The composite material has a uniform distribution of short fibers. When fibers are added to concrete it helps by reducing the cracking in the concrete, thereby increasing the overall energy absorption as well as the structural integrity. They also reduce the permeability of concrete, which lessens water bleeding through it. Greater impact, abrasion, and shatter resistance in concrete is produced by specific types of fibres.
Advtanges of Fiber Concrete
● Improves tensile strength.
● Lowers the natural porosity of gel’s air and water spaces.
● It makes the concrete more resilient.
The different types of fiber concrete are steel fiber, glass fibers, and synthetic fiber which are again classified into microfibers or macrofibers. Fiber reinforcement is used in both regular concrete and shotcrete, an aggregate and portland cement mixture that is applied by spraying. However, the most common type used in fiber concrete is round-shaped steel fibers. The addition of microfibers made of materials such as acrylic, polyester, nylon, or polypropylene, among others, to concrete results in a reduction of shrinkage cracks.
Getting back to the different types of fiber-reinforced concrete, the steel fiber concrete is popularly used for the construction of road pavement overlays, bridge decks, and airfield pavement.
On the other hand, glass fibers in concrete could commonly be used in the construction of modern and aesthetically pleasing structures, lower-weight structures, such as furniture or architectural claddings on buildings. As mentioned above the synthetic fiber in concrete is made up of one of two types of fibers namely the microfibers or macrofibers.
In contrast, the macrofibers serve as the most cost-effective reinforcement replacement for welded wire. They are used in concrete structures where high tensile strength is of prime importance. The other structures that are built with microfibers added to the mix include sidewalks, driveways, and curbs. The other common strong structures built using macrofibers are septic tanks and manholes.